Is the link reaction aerobic or anaerobic?
Aerobic respiration is a series of enzyme-controlled reactions that release the energy stored up in carbohydrates and lipids during photosynthesis and make it available to living organisms. There are four stages: glycolysis, the link reaction, the Krebs cycle and oxidative phosphorylation.
What is the link reaction in respiration?
During the link reaction, a carbon atom is removed from pyruvate, forming carbon dioxide. This converts pyruvate into a two-carbon molecule called acetate. Hydrogen is also removed from pyruvate in the conversion into acetate, which is picked up by the coenzyme NAD to form reduced NAD.
Where does the link reaction occur?
the mitochondrial matrix
The link reaction occurs in the mitochondrial matrix. It dehydrogenates and decarboxylates the three-carbon pyruvate to produce the two-carbon acetyl CoA that can enter the Krebs Cycle.
What is link reaction in mitochondria?
Linked reactions In mitochondria, pyruvic acid or pyruvate undergoes oxidative decarboxylation to produce acetyl-CoA, CO2, NADH2. In this process, pyruvate combines with coenzyme A and produces acetyl-CoA. Acetyl-CoA is the substrate for Kreb’s cycle.
What is anaerobic respiration equation?
Some examples of anaerobic respiration include alcohol fermentation, lactic acid fermentation and in decomposition of organic matter. The equation is: glucose + enzymes = carbon dioxide + ethanol / lactic acid. Though it does not produce as much energy as aerobic respiration, it gets the job done.
Is carbon dioxide released in link reaction?
In the link reaction, the 3-carbon compound pyruvate (or pyruvic acid) is converted into the 2-carbon compound acetyl coenzyme A. Pyruvate loses a carbon atom to become a 2-carbon compound. This carbon atom is released in the form of carbon dioxide.
What is the link reaction or gateway step of aerobic respiration?
So the correct answer is ‘Formation of acetyl coenzyme A’.
What are the difference between anaerobic and aerobic respiration?
There are two types of Respiration: Aerobic Respiration — Takes place in the presence of oxygen. Anaerobic Respiration –Takes place in the absence of oxygen.
Which enzyme catalyzes the link reaction?
pyruvate dehydrogenase complex
Pyruvate decarboxylation or pyruvate oxidation, also known as the link reaction (or oxidative decarboxylation of pyruvate), is the conversion of pyruvate into acetyl-CoA by the enzyme complex pyruvate dehydrogenase complex. The reaction may be simplified as: Pyruvate + NAD+ + CoA → Acetyl-CoA + NADH + CO2 + H.